SC4213H Very Low Input /Very Low Dropout 0.5 Amp Regulator With Enable POWER MANAGEMENT Features Description Input Voltage as low as 1.4V 75mV dropout @ 0.5A Adjustable output from 0.5V Over current and over temperature protection Enable pin 10µA quiescent current in shutdown Full industrial temperature range Fully WEEE and Halogen free. RoHS compliant The SC4213H is a high performance positive voltage regulator designed for use in applications requiring very low input voltage and very low dropout voltage at up to 0.5 amperes. It operates with a Vin as low as 1.4V. The SC4213H features ultra low dropout, ideal for applications where Vout is very close to Vin. Additionally, the SC4213H has an enable pin to further reduce power dissipation while shutdown. The SC4213H provides excellent regulation over variations in line, load and temperature. The SC4213H is available in an SOIC-8 package. The output voltage can be set via an external divider as shown in the typical application circuit. Applications Telecom/Networking cards Motherboards/Peripheral cards Industrial applications Wireless infrastructure Set top boxes Medical equipment Notebook computers Battery powered systems Typical Application Circuit U1 VIN ENABLE C1 NC NC VIN VO EN FB NC GND R1 C2 R2 VO = July 27, 2010 SC4213H 0.5(R1 + R2) R2 V © 2010 Semtech Corporation SC4213H Pin Configuration Ordering Information Device Package SC4213HSTRT(1)(2) SOIC-8 SC4213HEVB Evaluation Board Notes: (1) Available in tape and reel only. A reel contains 2,500 devices. (2) Available in lead-free packaging only. WEEE compliant and Halogen free. This component and all homogenous subcomponents are RoHS compliant. Marking Information 3H © 2010 Semtech Corporation SC4213H Absolute Maximum Ratings Recommended Operating Conditions VIN, EN, VO, FB to GND (V) . . . . . . . . . . . . . . . . . . -0.3 to +7.0 VIN (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 < VIN < 6.0 Power Dissipation. . . . . . . . . . . . . . . . . . . . . . Internally Limited Ambient Temperature Range (°C). . . . . . . . . . -40 < TA < +105 ESD Protection Level (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Junction Temperature Range (°C). . . . . . . . . . -40 < TJ < +125 (1) Maximum Output Current (A). . . . . . . . . . . . . . . . . . . . . . . . . 1 Thermal Information Thermal Resistance, Junction to Ambient(2)(°C/W). . . . . 105 Thermal Resistance, Junction to Case(2) (°C/W) . . . . . . . . Maximum Junction Temperature (°C). . . . . . . . . . . . . . 47 +150 Storage Temperature Range (°C) . . . . . . . . . . . . -65 to +150 Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . . +260 Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not recommended. NOTES: (1) Tested according to JEDEC standard JESD22-A114-B. (2) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards. Electrical Characteristics Unless specified: VEN = VIN, VFB = VO, VIN = 1.40V to 6.0V, IO = 10µA to 0.5A, TA = 25° C. Values in bold apply over the full operating temperature range. Parameter Symbol Conditions Min Typ Max Units 3 mA 50 µA VIN Quiescent Current IQ VIN = 3.3V, IO = 0A VIN = 6.0V, VEN =0V 10 VO VIN= VO + 0.5V, IO = 10mA Output Voltage(1) (Fixed Voltage, VFB = VO) VO -2% VIN = 1.8V, IO = 0.5A, 0°C ≤ TJ = TA ≤85°C 1.40V ≤ VIN ≤ 6.0V, IO = 10mA +2% VO -3% V +3% Line Regulation(1) REG (LINE) IO =10mA 0.2 0.4 %/V Load Regulation(1) REG(LOAD) IO =10mA to 0.5A 0.5 1.5 % 10 µA Minimum Load Current(3) IO Current Limit ICL © 2010 Semtech Corporation 1.5 A SC4213H Electrical Characteristics (continued) Parameter Dropout Voltage(1)(2) Symbol VDropout Conditions Min 1.4V ≤VIN<1.6V IO=0.5A Typ Max 75 150 Units mV 125 1.6V ≤VIN ≤6.0V Feedback 0.495 Reference Voltage(1) Feedback Pin Current 0.505 VREF VIN = 3.3V, VFB = VOUT , IO =10mA 0.5 IADJ VFB = VREF 80 200 nA IEN VEN = 0V, VIN =3.3V 1.5 5 µA 0.490 V 0.510 EN Enable Pin Current Enable Pin Threshold VIH VIL 1.6 VIN=3.3V V 0.4 Over Temperature Protection High Trip Level Hysteresis THI 160 O C THYST 10 O C Notes: (1) Low duty cycle pulse testing with Kelvin connections required. (2) VDO = VIN -VO when VO decreases by 1.5% of its nominal output voltage with VIN = VO +0.8V. (3) Required to maintain regulation. Voltage set resistors R1 and R2 are usually utilized to meet this requirement. © 2010 Semtech Corporation SC4213H 0.25 0.50 SC4213H Typical Dropout Voltage at Vout = 1.4V 0.10 Dropout Voltage (V) 0.08 125OC 0.05 25OC -40OC 0.03 0.00 0.0 0.1 0.2 0.3 0.4 0.5 Iout (A) SC4213H Typical Dropout Voltage at Vout = 3.3V SC4213H Typical Dropout Voltage at Vout = 1.6V 0.08 0.10 0.06 Dropout Voltage (V) Dropout Voltage (V) 0.08 O 125 C 0.05 25OC - 40OC 125OC 25OC 0.04 - 40OC 0.02 0.03 0.00 0.00 0.0 0.1 0.2 0.3 Iout (A) © 2010 Semtech Corporation 0.4 0.5 0.0 0.1 0.3 0.4 0.5 Iout (A) SC4213H Pin Descriptions Pin # Pin Name 2 EN Enable Input. Pulling this pin below 0.4V turns the regulator off, reducing the quiescent current to a fraction of its operating value. The device will be enabled if this pin is left open. Connect to VIN if not being used. 3 VIN Input voltage. For regulation at full load, the input to this pin must be between (VO+ 0.5V) and 6.0V. Minimum VIN = 1.4V. A large bulk capacitance should be placed close to this pin to ensure that the input supply does not sag below 1.4V. Also a minimum of 4.7µF ceramic capacitor should be placed directly at this pin. 6 VO The pin is the power output of the device. A minimum of 10uF capacitor should be placed directly at this pin. 7 FB Tied to external feedback resistors to program the output voltage. The output voltage will be determined by the resistor ratio (See Application Circuits on page 1) 8 GND 1, 4, 5 NC THERMAL PAD Pin Function Reference ground. The GND pin and the exposed die pad must be connected together at the IC pin. No Connection. Pad for heatsinking purposes. Connect to ground plane using multiple vias. Block Diagram © 2010 Semtech Corporation SC4213H Applications Information (continued) Component Selection Input capacitor: A large bulk capacitance ≥ 4.7µF (output load) should be closely placed to the input supply pin of the SC4213H to ensure that Vin does not sag below 1.4V. Also a minimum of 4.7µF ceramic capacitor is recommended to be placed directly next to the Vin pin. This allows for the device being some distance from any bulk capacitance on the rail. Additionally, input droop due to load transients is reduced, improving load transient response. Additional capacitance may be added if required by the application. Output capacitor: A minimum bulk capacitance of 4.7µF, along with a 0.1µF ceramic decoupling capacitor is recommended. Increasing the bulk capacitance will improve the overall transient response. The use of multiple lower value ceramic capacitors in parallel to achieve the desired bulk capacitance will not cause stability issues. Although designed for use with ceramic output capacitors, the SC4213H is extremely tolerant of output capacitor ESR values and thus will also work comfortably with tantalum output capacitors. Noise immunity: In very electrically noisy environments, it is recommended that 0.1µF ceramic capacitors be placed from VIN to GND and VO to GND as close to the device pins as possible. ≤50kΩ). A suitable value for R2 can be chosen in the range of 1kΩ to 50kΩ. R1 can then be calculated from: R1 = R 2 ⋅ (VO − VREF ) VREF Enable: Pulling this pin below 0.4V turns the regulator off, reducing the quiescent current to a fraction of its operating value. A pull up resistor up to 400kOhms should be connected from this pin to the VIN pin in applications where supply voltages of Vin < 1.9V are required. For applications with higher voltages than 1.9V, the EN pin can be left open or connected to VIN. Thermal Considerations The power dissipation in the SC4213H is given by: PD ≈ IO ⋅ (VIN − VO ) The allowable power dissipation will be dependant on the thermal impedance achieved in the application. The derating curve below is valid for the thermal impedance specified in the Thermal Information section on page 3. Power Derating Curve 1.5 Allowable Power Dissipation P D (W) Introduction The SC4213H is intended for applications where high current capability and very low dropout voltage are required. It provides a very simple, low cost solution that uses very little PCB real estate. Additional features include an enable pin to allow for a very low power consumption standby mode, and a fully adjustable output. 1 RTH(JA)=105OC/W 0.5 0 0 External voltage selection resistors: The use of 1% resistors, and designing for a current flow ≥ 10µA is recommended to ensure a well regulated output (thus R2 © 2010 Semtech Corporation 25 50 75 100 125 O Ambient Temperature T A ( C) SC4213H Outline Drawing — SOIC-8 A D e N DIMENSIONS INCHES MILLIMETERS DIM MIN NOM MAX MIN NOM MAX 2X E/2 E1 E 1 2 ccc C 2X N/2 TIPS e/2 B D aaa C SEATING PLANE C .053 .069 .004 .010 .049 .065 .012 .020 .007 .010 .189 .193 .197 .150 .154 .157 .236 BSC .050 BSC .010 .020 .016 .028 .041 (.041) 8 0° 8° .004 .010 .008 A A1 A2 b c D E1 E e h L L1 N 01 aaa bbb ccc h A2 A bxN bbb 1.35 1.75 0.10 0.25 1.25 1.65 0.31 0.51 0.17 0.25 4.80 4.90 5.00 3.80 3.90 4.00 6.00 BSC 1.27 BSC 0.25 0.50 0.40 0.72 1.04 (1.04) 8 0° 8° 0.10 0.25 0.20 A1 h H C A-B D c GAGE PLANE 0.25 SEE DETAIL SIDE VIEW A L (L1) DETAIL 01 A NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DATUMS -A- AND -B- TO BE DETERMINED AT DATUM PLANE -H- 3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 4. REFERENCE JEDEC STD MS-012, VARIATION AA. © 2010 Semtech Corporation SC4213H Land Pattern — SOIC-8 X DIM (C) G Z Y C G P X Y Z DIMENSIONS INCHES MILLIMETERS (.205) .118 .050 .024 .087 .291 (5.20) 3.00 1.27 0.60 2.20 7.40 P NOTES: 1. 2. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. REFERENCE IPC-SM-782A, RLP NO. 300A. © 2010 Semtech Corporation SC4213H © Semtech 2010 All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent or other industrial or intellectual property rights. Semtech assumes no responsibility or liability whatsoever for any failure or unexpected operation resulting from misuse, neglect improper installation, repair or improper handling or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the specified maximum ratings or operation outside the specified range. SEMTECH PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF SEMTECH PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE UNDERTAKEN SOLELY AT THE CUSTOMER’S OWN RISK. Should a customer purchase or use Semtech products for any such unauthorized application, the customer shall indemnify and hold Semtech and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs damages and attorney fees which could arise. Contact Information Semtech Corporation Power Mangement Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805) 498-2111 Fax: (805) 498-3804 www.semtech.com © 2010 Semtech Corporation 10